Belt



jim, l, i924 IH. C. EGERTON BELT Filed Oct. 5. 1918 'f' Iliff/12%' f Patented dan., ll, llQZel,

narrar e. neueren', or mnenwoon, new 1r PATENT @FFHCQ BELT.

Application led @ctoher 5, l91. Serial No. 256,989.

To aZZ wiwm t may concern.

Be it known that l, HENRY C. Een-MON, a citizen of the United States, and resident of Ridgewood, county of Bergen, State of New Jersey, have made a certain new and useful invention Relating to Belts, of which the following is a specification taken in connection with the accompanying drawing This lnvention relates especially to driving and carrier belts in wnich the body or traction member of the belt comprises strips or tapes of fabric, threads, cords, or other fibrous material containing cured phenolic condensation cementing material so as lo l5 greatly increase the strength of the same. Preferably a connector member or layer of fabric is cemented or united to this traction member as by such cementing material and may advantageousl be formed with -a frictioned or other ru ber coating to which a layer of vulcanized rubber is secured so as to be strongly and permanently united to the traction member of the belt and considerably strengthen the same by preventin undesirable bending or cracking thereo For some purposes driving belts of this construction may advantageously be formed vwith a wearing surface or layer ofvvulcanized rubber on the other side ofthe bod or traction member and this is of course a vantageous in carrier belts which may be formed with projecting flights, buckets or carrier members cemented or otherwise secured to the belt and formed, if desired, with vulcanized rubber facing or covering portions. ln the accompanying drawing showing in a somewhat diagrammatic way illustrative embodiments of this invention,

Fig. 1 is a partial longitudinal section through a carrier belt of this .general charactor, the parts being shown in separated position for greater ,clearness A Fig. 2 is an enlarged detail section thereof; and l Figs 3 and 4 are similar detail sections through other belt constructions. l

rlhe strength of canvas or other fabric or fibrous material used in making power an other belts can be eatly increased by incorporating therewith a suitable amount of cured phenolic condensation cementing material, such, for instance, as bakelite, condensite or redmanol varnish compositions, by impregnating the canvas with such compositions as bakelite varnish No.1, for example, and drying and heat curing under ressure, so that the cured impregnated abric contains thirty to forty percent more or less, by weight, of the cementing material. rllhe cured phenolic condensation cementing material seems to quite thoroughly impregnate the threads and fibres of the fabric and greatly increase the tensile strength thereof, so that where the number of layers of fabric in the belt body or traction member is not excessive, and allows the bending around the pulleys used, a'ver' strong and light belt bod is thus secure It is of course understoo that it is generally undesirable to use an excessive quantity of .phenolic condensation cementing material be ond what can be properly absorbed by the bres or threads of the fabric, unless, of course, some special softening agents are incorporated in the phenolic condensation cementing material, such as suitable waxy, oily or other components, for in-v stance, castor oil, which'may be present to the extent of five to fifteen per cent more or less of the cured cementing material vin some cases, although considerably reducingr the strength thereof. By thoroughly and securely uniting a gripping and strengthening layer `of vulcanized rubber to such a traction member, its frictional grip on the pulley faces is greatly increased and the elastic resistance of the rubber also exerts a highly desirable strengthening action on the cured impregnated fabric by minimizing or preventing cracking and breaking l when bending occurs. indeed, the rubber seems to make possible a much greater extent of bending without inju than is possible with a similarm'ultiple ayer piece of canvas impro ated with r lar cured bakelite varnis ,for instance. indicated in Figs. 1 and 2 the belt body or traction member 4 may be in the form of a number d of layers of canvas impregnatedwith or carrying phenolic condensation 4cementing material of this character and it is of coursel advantageous to use an endless stripor sheet of canvas which may extend a number of times around the belt and thus minimize joints. As indicated this canvas or other fabric makes three complete turns so that this traction member of the belt comprises three thicknesses of such impregnated canvas or fabric at every part. lt is desirable to interpose a fabric connector member be-l tween t e impregnated traction member of the belt and the rubber rippin and strengthening member thereof and this connector member or layer 2 may be formed of relativel thin canvas or other suitable fabric whic has preferably been provided with a frictioned or other` rubberv coating 3 on the face with which the rubber or traction member engages. The other side of this connector member may be forced into engagement with the impregnated fabric constituting the traction member of the belt so as to be securely and thoroughly cemented thereto by the henolic condensation cementing materia during the heat curing and vulcanizing treatment to which the parts are subjected. As indicated a substantially uniform rubber layer or member 1 may be applied to the rubberized surface of the connector member and all of these parts may be forced together durin the vulcanizing and curing treatment durmg which they are held underressure for an hour more or less while belng heated to temperatures of 250 to 320 F. o r so to thorou hly vulcanize the rubber composition an 'cure or solidify the phenolic condensation cementing material and also cement or unite all of the parts together.

When used as a carrier belt an additional Wearing surface is preferably provided which may be formed of vulcanized rubber or other suitable material and may, il desired, enclose and protect any projecting flights or ribs which are desired on the outer or carrying surface of the belt. As indicated in Figs. 1 and 2, the carrier Hight may comprise a metallic rib or support 7 of any suitable form and construction and may, if desired, be formed with the angular brackets or foot plates 8 which may be securedto the traction member of the belt in any suitable way as by rivets 20 shown, or by one or. more layers or thicknesses 5, 6, of canvas or other material impregnated with such cementingmaterial and enclosingv the flight rib or support which may have apertured portions 11 to facilitate this uniting action@ The carrier Wearing surface or member 10 of rubber com osition may also extend over this surface o the belt and have portions 9 extending around the carrier flights thereon and may be permanently and securely united 'i thereto during the vulcanizing and curing process described. The heat and pressure of this process .seems-to soften or melt the remesa phenolic condensation cementing material adjacent the rubber which is forced sufficiently into the pores or interstices of the fabric so as to grippingly engage the same and secure thorough adherence Without necessitating in all cases the use of a preliminary frictioned or other rubber coating on the fabric.

Fig. 3 shows another form of carrier or 15, 16 to one or both sides of the fabric or to additional connector layers applied thereto, rubber strengthening members 12, 14,

may be securely united and vulcanized to one or both sides of the traction member so as to increase the life of the belt for power or carrier purposes. Fig. 4 shows a generally similar arrangement in which the traction or body member 18 is formed of a number of layers of suitable fabric or fibrous material to one of which a frictioned or other rubber coating 19 may be applied so las to promote the adherence of the rubber strengthening layer or member 17 when the Whole is vulcanized and cured together under the desired heat and pressure.

This invention has been described in connection with a number of illustrative embodiments, forms, proportions, elements, parts, shapes, materials, compositions, and methods of preparation, production and use, to the details of which disclosure the invention is n`ot of course to be limited, since what is claimed as new and what is desired to be secured b Letters-Patent is set forth in the appende claims.

l claim- 1. The belt.I comprising a body traction member formed of a number of layers of canvas carrying and thoroughly impregnatved with thirty to forty per cent by weight of cured phenolic condensation cementing material, a fabric connector cemented to said traction member, a vulcanized rubber strengthening and gripping member secure- -ly united and vulcanized to said connector,

Hight supports secured to one side of said traction member, and a vulcanized rubber carrier surface permanently secured to said traction member and said flight supports to substantially enclose the same. v

2. The belt comprising a body traction member formed of a number of layers of fabric carrying curedA phenolic condensation rac remesa rubber strengthening and gripping membery securely united to and vulcanized to said connector, flight members secured to" one side of said traction member, and a vulcanized rubber carrier surface permanently secured to said traction member and said flight members to substantially enclose the same.

3. The belt comprising a body traction member formed ofl a number of layers of fabric carrying cured phenolic condensation cementing material, a fabric connector cemented to said traction member, a vulcanized rubber strengthening and gripping member securel united to said connector, and flight mem ers secured to one side 'of said traction member.

4. The belt comprising a traction member formed of a number of layers of canvas carrying and thoroughly impregnated with thirty to forty per cent by Weight ofl phenolic condensation cementing material comprising softening material, a fabric connector cemented to said traction member and a vulcanized rubber strengthening and gripping member securely united and vulcanized to said connector.

5. The belt comprising a traction member formed of fabric carrying phenolic condensation cementing material comprising softening material, a fabric connector cemented to said traction member and a vulcanized rubber strengthening and gripping member securely united and vulcanized to said connector.

6. The belt comprising a traction member formed of fabric carrying phenolic condensation cementing material comprising softening material, and a vulcanized rubber strengthening member 'securely united to said traction member.

8. rl`he belt comprising a body member.

formed of a number of layers of fabric carrying phenolic condensation cementing material and vulcanizedrubber strengthening members securely united and vulcanized to both sides of said traction member.

9. The belt comprising a body member formed' of fibrous material carrying phenolic `condensa-tion cementing material, and vul-- canized rubber strengthening members securely united and vulcanized to both sides of said traction member.

10. The belt comprising a number of layers of fibrous material impregnated `with phenolic condensation cementing material, and vulcanized rubber strengthening and gripping members securely united and vulcanized to said fibrous material'.

11. rlhe belt comprising fibrous material carrying phenolic condensation cementing material, and a vulcanized rubber member securely united to said fibrous material.

12. The belt comprising a number of la ers of fabric carrying and impregnated with thirty to forty per cent by Weight of phenolic condensation cementing material and vulcanized rubber .strengthening and gripping members securely united to both sides of said fabric.

13. The belt comprising a number `of layers of fabric carrying phenolic condensation cementing material and vulcanized rubber strengthening and grippingmembers securely united to both sides of said fabric.

14. rllhe belt comprising fabric carrying phenolic condensation cementing material and a vulcanized rubber strengthening and gripping member securely united' to said fabric. A

15. The carrier belt comprising a body traction member formed of a number of layers of canvas fabric carrying phenolic condensation cementing material and connected projecting flight supports comprising fabric and incorporated phenolic condensation cementing material and secured to said traction member and a vulcanized rubber carrier surface permanently secured to said traction member and said flight supports to `substantially enclose the same.

16. The carrier belt comprising a body traction member formed of fabric and connected projecting flight supports comprising fabric and incorporated phenolic condensation cementing material and secured to said traction member.

17. 'llhe belt comprising a body member comprising fabric and connected projectin flight members comprising fibrous materia and incorporated phenolic condensation cementing material.

18. The belt comprising a body member and connected projecting members comprising fibrous material and incorporated phenolic condensation cementing material.

19. The endless belt comprising a thin fiexible body traction member formed of a plurality of superimposed layers of fabric connected' and lstrengthened by thirty to forty per cent of incorporated cured phenolic condensation cementing material and a vulcanized rubber facing secured to said traction member.

20. The belt comprising a thin flexible body traction member formed of a plurality ofsuperimposed layers of fabric connected and strengthened by incorporated' cured phenolic condensationA cementing material and a vulcanized 'rubber facing secured to Said traction member. 4

21. The flexible endless belt formed of a layerw/of fibrous material connected and strengthened by thirty to forty per cent of l incorporated cured' phenolic condensation cementing material.

' 22. The thin flexible belt comprising a,v

plurality of superimposed layers of fabric l0. connected and strengthened by incorporated cured phenolic condensation cementing material.

23. The belt comprising. a thin flexible body formed of a plurality of superimposed layers of fabric connected and strengthened b more than twenty per cent of incorporated cured phenolic condensation cementing material. I

, HENRY C. EGERTON. 

